import auth from '@/plugins/auth'
import router, {constantRoutes, dynamicRoutes} from '@/router'
import {getRouters} from '@/api/menu'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'

//超级管理员侧边栏中不需要显示的菜单项组件
const superAdminBlackList = ["BasicSetting", "TaocanSetting", "OperationManagement"]

//景区管理员侧边栏中不需要显示的菜单项组件
const scenicAdminBlackList = ["Scenic", "Monitor"]

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: []
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes
      state.routes = constantRoutes.concat(routes)
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      state.topbarRouters = routes
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes
    },
  },
  actions: {
    // 生成路由
    GenerateRoutes({commit}) {
      return new Promise(resolve => {
        // 向后端请求路由数据
        getRouters().then(res => {
          const sdata = JSON.parse(JSON.stringify(res.data))
          const rdata = JSON.parse(JSON.stringify(res.data))
          resolveConstantRoutes();
          const sidebarRoutes = filterAsyncRouter(sdata)
          const rewriteRoutes = filterAsyncRouter(rdata, false, true)
          const asyncRoutes = filterDynamicRoutes(dynamicRoutes);
          rewriteRoutes.push({path: '*', redirect: '/404', hidden: true})
          router.addRoutes(asyncRoutes);
          commit('SET_ROUTES', rewriteRoutes)
          commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
          commit('SET_DEFAULT_ROUTES', sidebarRoutes)
          commit('SET_TOPBAR_ROUTES', sidebarRoutes)
          resolve(rewriteRoutes)
        })
      })
    }
  }
}

function resolveConstantRoutes() {
  let isSuperAdmin = auth.isSuperAdmin();
  constantRoutes.map(route => {
    // console.log("resolveConstantRoutes route= ", route)
    if (route.children && route.children.length && route.children[0].name === "Index") {
      if (!isSuperAdmin) {
        route.children[0].hidden = true;
        route.children[0].meta.affix = false;
      }
    }
  })
}

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  let isSuperAdmin = auth.isSuperAdmin();

  return asyncRouterMap.filter(route => {
    // console.log("filterAsyncRouter route: ", route);
    //景区管理员可以查询自己景区的信息，但不能在左侧边栏中显示景区管理的菜单项，因为每个景区管理员只能查询自己所属景区的信息。
    // if (!isSuperAdmin && route && route.name === "Scenic") {
    //   route.hidden = true; //在左侧边栏中隐藏景区管理的菜单项
    // }
    //
    // if (!isSuperAdmin && route && route.name === "Monitor") {
    //   route.hidden = true; //在左侧边栏中隐藏景区管理的菜单项
    // }

    if (!isSuperAdmin && route && route.name === "System") {
      route.meta.title = "景区管理"; //在左侧边栏中隐藏景区管理的菜单项
    }

    //隐藏超级管理员侧边栏中不需要显示的菜单项组件
    if (isSuperAdmin && route && superAdminBlackList.indexOf(route.name) !== -1) {
      route.hidden = true;
    }

    //隐藏景区管理员侧边栏中不需要显示的菜单项组件
    if (!isSuperAdmin && route && scenicAdminBlackList.indexOf(route.name) !== -1) {
      route.hidden = true;
    }

    if (!isSuperAdmin && route && route.name === "BasicSetting") {
      route.meta.affix = true;
    }

    if (type && route.children) {
      route.children = filterChildren(route.children)
    }
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === 'Layout') {
        route.component = Layout
      } else if (route.component === 'ParentView') { //二级组件依然是父组件，比如：日志管理等。
        route.component = ParentView
      } else if (route.component === 'InnerLink') {
        route.component = InnerLink
      } else {
        route.component = loadView(route.component)
      }
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type)
    } else {
      delete route['children']
      delete route['redirect']
    }
    return true
  })
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach((el, index) => {
    if (el.children && el.children.length) {
      if (el.component === 'ParentView' && !lastRouter) {
        el.children.forEach(c => {
          c.path = el.path + '/' + c.path
          if (c.children && c.children.length) {
            children = children.concat(filterChildren(c.children, c))
            return
          }
          children.push(c)
        })
        return
      }
    }
    if (lastRouter) {
      el.path = lastRouter.path + '/' + el.path
    }
    children = children.concat(el)
  })
  return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
  let isSuperAdmin = auth.isSuperAdmin();
  const res = []
  routes.forEach(route => {
    if (route.permissions) {
      if (auth.hasPermiOr(route.permissions)) {
        res.push(route)
      }
    } else if (route.roles) {
      if (auth.hasRoleOr(route.roles)) {
        res.push(route)
      }
    }
  })
  return res
}

export const loadView = (view) => {
  if (process.env.NODE_ENV === 'development') {
    return (resolve) => require([`@/views/${view}`], resolve)
  } else {
    // 使用 import 实现生产环境的路由懒加载
    return () => import(`@/views/${view}`)
  }
}

export default permission
